use std::env;
use std::process;
pub fn main() -> () {
    let args: Vec<String> = env::args().collect();
    if args.len() != 2 {
        eprintln!("Usage: {} <number>", args[0]);
        process::exit(1);
    }
    let value = unsafe { atoi(args[1].as_ptr() as *const i8) };
    println!("Parsed integer: {}", value);
}
